marco wrote:

<snip>

> Platinum plugs are meant to be used for like 3% or 4% of your car's
> life. They are good for cleaning the carbon out of cylinders.
>
> If the engine is already clean of carbon, then the platinum will cause
> pre-detonation.
>
> Platinum is a catalyst. In effect, it accelerates the burning of
> hydrocarbons. Carbon deposits on pistons and valves in the cylinder
> will be burned off by the platinum on Platinum plugs.
>
> When the engine is clean, the platinum becomes a demon.
>
> I learned this the hard way. Extra platinum leads to piston holes.
>
>
>
> Marco

I forgot to mention spun bearings, knocking rods, burned valves, and the
myriad other problems unexplained until platinum plugs are entered into
the mix.

Use them according to your owners manual. If in doubt, don't use them
and use OEM standards instead.

Anyways, your symptoms exactly match this prognosis, and it brought up
long repressed memories for me.. :-)



Marco